FactionFab Titanium Rear Brake Shim Set 2004-2017 Subaru STI | Thermal Barrier | Brake Performance Upgrade

Overview

The FactionFab Titanium Rear Brake Shim Set is designed specifically for the Subaru WRX STI models from 2004 to 2017, providing a critical upgrade for enthusiasts focused on track, autocross, or spirited driving. These shims act as a thermal barrier between the brake pad and caliper piston, reducing heat transfer that can lead to brake fade and compromised stopping power. For Subaru owners pushing their braking systems to the limit, this simple yet effective solution helps maintain consistent brake performance under extreme conditions.

Crafted from 6AL-4V Grade 5 titanium, these shims leverage titanium’s low thermal conductivity to insulate the caliper piston from the intense heat generated during aggressive braking. At 1.0mm thick, they offer superior insulation compared to thinner steel or competitor shims, ensuring better heat dissipation and protection. FactionFab’s engineering approach focuses on durability and track-ready performance, making these shims a trusted choice among Subaru enthusiasts who demand reliability and safety on the track.

By reducing heat soak into the calipers, these titanium shims help prevent brake fluid boiling, which can cause dangerous brake fade. This translates to more consistent pedal feel, extended brake pad life, and improved overall braking confidence during extended track sessions or autocross runs. For Subaru WRX STI owners looking to maximize their braking system’s potential without extensive modifications, these shims provide a practical and effective upgrade.

Features & Specifications

This FactionFab Titanium Rear Brake Shim Set is engineered for Subaru WRX STI models from 2004 to 2017 and features 1.0mm thick Grade 5 titanium construction. Made from 6AL-4V titanium, it delivers superior thermal insulation to reduce heat transfer and brake fade, ideal for Subaru enthusiasts seeking enhanced brake performance and reliability on the track.

• Brand: FactionFab
• Product: Titanium Rear Brake Shim Set
• Part Number: 1.10315.2
• Fitment: 2004-2005 STI, 2006-2007 STI, 2008-2010 STI, 2011-2014 STI, 2015-2017 STI
• Material: 6AL-4V / Grade 5 Titanium
• Finish: Natural titanium finish
• Construction: Precision laser-cut, 1.0mm thickness
• Origin: Not specified
• Thickness: 1.0mm (superior insulation compared to 0.5mm competitors)
• Quantity: 4 shims per kit

Key Benefits

• Thermal Management: Significantly reduces heat transfer from brake pads to caliper pistons, preventing fluid boiling and brake fade.
• Performance Consistency: Maintains stable braking performance during extended track or autocross sessions.
• Durability: Made from Grade 5 titanium, offering excellent strength and corrosion resistance under harsh conditions.
• Fitment Precision: Designed specifically for Subaru WRX STI rear brakes with FMSI D961 pads for a perfect fit and easy installation.
• Extended Pad Life: By reducing heat soak, it helps prolong brake pad lifespan, saving maintenance costs over time.
• Track Compliance: Compatible with most SCCA and NASA classes, making it suitable for competitive motorsport use.

What's Included

• 4× FactionFab Titanium Rear Brake Shims (1.0mm thick)
• Installation instructions

Installation & Compatibility

Installation of the FactionFab Titanium Rear Brake Shim Set is straightforward for anyone familiar with brake maintenance and pad replacement. These shims fit directly behind the brake pads on the rear calipers of Subaru WRX STI models from 2004 through 2017 that use FMSI D961 pads. No special tools beyond standard brake service equipment are required. While the installation can be performed by experienced enthusiasts, professional installation is recommended if you are unfamiliar with brake system work. No modifications to the caliper or pads are necessary, and no tuning is required since this is a mechanical heat management upgrade.

• Professional Installation: Recommended for safety and proper fitment
• Modifications Required: None
• Verify Compatibility: Confirm your STI model year and brake pad type (FMSI D961) before purchase

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